The recruiter behaves really in a professional manner during the interview. In general he is really official, and questions with he/she gives are not that typical for ex. what was the most difficult experience in your life which you had to struggle with and stuff like that. Recruiter pays attention to everything even if you think he/she's not looking or listening to you, believe, he/she is! First of all the interview starts with an IQ, Math, Physics, Electric and Mechanical test. All of them take like up to 5 hours. After the results you can come for f2f interview if you were good enough. Most often you have to assembly some mechanical part having some scheme in front (it's not named) and you're being asked multiple questions, they want to distract you and check the multitasking ability.Then there is some presentations about yourself, some weak and strong aspects and short description (prepare a good and simple one!) Then there is time fot team work. Most often you have to build something from paper, like an arch for example. There is only duck tape and paper :) limited number! Then you have to wait for the decision and offer!